Effect of Active Vitamin D and Etelcalcetide on Human Osteoclasts in Patients With Chronic Kidney Disease

Inclusion Criteria

• •Child of age\> 2 years old and \<18 years old.
• •Child over 10 kg having a blood sample as part of the treatment (due to regulatory constraints for blood volume taken by 30-day period of 40 mL in children over 10 kg)
• •Child with chronic kidney disease followed in the pediatric nephrology department of the "Hôpital Mère Enfant" in Bron.
• •Child and parent / holder of parental authority who has been informed of the study and does not object to participate